Roller friction-clutch.



NITED STA'IES PATENT OFFICE.

AUGUSTUS O. F. DANN, OF SOUTHSEA, ENGLAND.

ROLLER FRICTION-CLUTCH.

Patented Nov. 20, 1906.

Original application filed August 29, 1903, Serial N0. 171,180. Divided and this applioation fi1ed November 19, 1903. Serial Zb all w7wm it m.ay c0ncern:

B0 it known that I, AUGUSTUS CARDIGAN FREDERICK DANN, a subj0ct of th0 King 0f Gr0at Britain and Ireland, r0siding at 54 St. Augustin0 road, Souths0a, in th0 county 01" Hants, England, hav0 inv0nted certain new and us0tul Improvements in R0ll0r Friction0lutches, of Which the following is a sp0cification, (f01 whicl1 I have obtained pat0nts in B0lgium, dated August 21, 1903, N0. 172,136; Luxemburg, Au ust 24, 1903, N0. 5,249; and hav0 applied I01 patents in Gr0at Britain, dat0d August 21, 1903, N0. 18,127; Germany, dated August 21, 1903; Denn1ark, August 21, 1903, N0. 1,011; Franc0, August 21, 1903, N0. 886; Sweden, August 21, 1903, N0.,1,593; Norway, August 22, 1903, N0. 16,733; Spain, August 24,1903, N0. 1750; Switzerland, August 22, 1903, N0. 33,069; Russia, August 25, 1903; Hungary, August 28, 1903, N0. 11,310; Austria, August 24, 1903; Canada, August 29, 1903, N0. 107,490; Italy, August 24, 1903, N0. 17,391, and Portugal, August 24.)

This inv0ntion, Whi0h was includ0d in rny original application fil0d August 29, 1903, Serial N0. 171,180, 0f Wl1i0h this is a division, 10lates t0 in1provements in friction-clutohes 0f th0 l ind in Whi0h th0 two members ar0 correlated by 1n0ans 0f 0110 0r 1n010 roll0rs W01king betwe0n inclin0d surfaces on th0 two 1n01nbers; and it consists in providing the roll0rs with a band 0f teetl1 round th0ir periphery which 0ngage witl1 a corresponding band 0f t00th form0d in 0n0 of th0 clutch 1110n1b0rs. By this m0ans the rollers ar0 always f0100d t0 roll along the clutchsurfaces in moving between tl10 f100 and elutched positions and tl10 liability to the formation 0f flat portions 0n the roll0rs completely an nulled.

In th0 accompanying drawings, Figur0 1 is an elevation, partly in s0ction, 0f a clutch oonstructed according to th0 present inv0ntion; and Fig. 2, a transverse vertical section through tl10 00nt01 0f Fig. 1.

K0yed 0n th0 shaft a is a disk b, forming th0 fixed m01nber of th0 clutch, th0 1"r00 1110mb01 0f Which is th0 inclosing casing 01 sl1ell c. Th0 periphery 0f the disk b is 0ut avvay in 0110 or m010 places to forma plane surfac0s Z), betw0en Whi0h and the inner face c 0f th0 rim 0f tl1e sh0llc th0 rollers d operate in th0 wellknown manner. These rollers are for1ned with a band 0f t00th d, preferably round th0 middl0 part, wl1i0h proj0cts beyond th0 1701101- surfac0s and engag0 with a corresponding band of te0tl1 c f011110d in th0 inn0r periphery 0f th0 rim c. A slot 11 is 0ut al0ng th0 fa0e 0f the plane surfa00 b and its cylindrical continuation 0f suffici0nt d0pth t0 0l0ar th0 t00th of th0 roll0rs.

The t00th 0n th0 roll0rs and 011 th0 clutch sl1ould b0 in engag0m0nt f01 all positions 0f th0 roll0r; but th0y must n0t engage With transmit when in th0 clutched position.

said invention and th0 best means I know of carrying the sam0 int0 praetical 0ff0ct, I clai1n 1n01nb0r, an outer m0mber, a 101101 between th01n having a smooth cylindrical surfac0 011- gaging smooth inclined surfaces 0n th0 two memb0rs, and a band 0f t0eth formed 0n th0 101101 and engaging in a corresponding band ofteeth form0d 011 0n0 of tl10 m01nb0rs 0f th0 elutch.

2. In 10ll01 ,fricti0n e clutches, an inn0r 1n0n1b01, an 0ut01 1110n1b01, a 10l161 b0tw0en them having a srnooth cylindrical surfac0 engaging sm0oth inclin0d surfaces 011 th0 tw0 n1ernbers, and a band 0f teeth f01n10d 0n the roll01s and engaging in a corresponding band 01 t00tl1 0n the loos0 men1ber 0f the clutcl1; substantially as describ0d.

3. A frieti0n-clutch comprising 0n0 memb01 fix0d t0 a shaft 0n which th0 second m01nber is loosely mount0d, both members l1aving sn100th opepating-surfaces, 0n0 01 1110r0 roll0rs having srnootl1 surfaees arrang0d t0 0ngag0 said operating-surfaces 0f botl1 m0mb0rs friotionally f0r a given direction 015 rotation- 0f th0 shaft, 0ach 1Oll6l b0ing provided with a band 0f t00th in engagement with a corresponding band 0f t00th 0n 0n0 0f th0 two m0mb0rs of th0 clutch.

4. A friction-clutch comprising 0n0 n10n1- b0r fixed t0 a shaft on Which the second member is loosely mounted, both m0n1bers hav1'ng smootl1 operating-surfaces, and one 01 mor0 roll0rs having smooth surfaces ar rang0d t0 engage said operatingsurfaces 0f both members frictionally for a given direction 0f rotation 0f th0 shaft, each roll0r being provided Witl1 a band of t00th in engagement Having thus describ0d tl10 nature 0f my 0ach other 111 such a way as t0 b0 subject0d. t0 any part .of th0 stress which th0 rollers 1. In roll0r friction-clutches, an inn0r IOO ' er of said Shell, and a band of teeth n each each such flat with a corresponding band of teeth 0n the loose member cf thc clutch; substantially as l described.

5. A friction-clutch comprising a disk surrounded b a shell having an internal smooth cylindricafsurface, one or more flat portions on the periphery of the disk,- a rcller for each such flat portion having a smooth surface adapted to engage between the said flat portion and the inner periphery cf said shell, and means for compelling ehe rollers t0 rotate When they are moved translationally 6. A fr1ction-clutch comprising a disk surrounded by a shell having an internal cylindrical surface, one or more fiat portions 0n the pcriphery cf the disk, a roller hav1'ng a smooth surface adapted 110 engage between each such fiat portion and the inner periphro 1er in engagement with a corresponding band cf teeth on one cf the clutch members.

7. A friction-clutch comprising a disk surrounded by a shell having an internal cylindrical surface, one 01 more flat portions on the periphery cf the disk, a rollcr having a s1nooth surface adapted to engage between portion and the inner periphery of said Shell, and a band 0f te6th on each roller in engagcment with a corresponding band cf tecth 0n the inner periphery cf the cylindrical shell; substantially as described. 8. A frict ion-clutch comprising a disk fixed '00 a shaft, a Shell having an intcrnal cylindrical surface surrounding ehe disk and loosely mounted on the said shaft, one 01 m0re fiat portions on the periphery cf thc disk, a roller having a smooth surface adapted 00 engage betwecn each such flat portion and the inner periphery of said Shell, a band cf teeth on each roller in engagement with a corresponding band of teeth 0n the inner periphery cf the cylindrical Shell; substantially as described.

9. A friction-clutch comprising a disk fixed to a shaft, a cylindrical shell surroundingthe disk and loosely mounted 0n the said shaft, one or more flat portions on ehe periphery cf the disk a roller adapted to engage between each such flat portion and the inncr periphery of the cylindrical shell a band cf teeth on each roller, a corresponding band 0f teeth on the inner periphery of the shell in engagement with the roller-tceth, and a slot in the face of each said flat portion to admit ehe roller-teeth, substantially as described.

10. A friction-clutch comprising a disk keyed to a shaft, a cylindrical shell surrounding the disk and loosely mounted 0n the said shaft, a plurality cf '10llers engaging between the inner periphery of the cylindrical shell and flat portions formed on the edge of ehe disk, bands of tecth on the rollers in cngagemcnt with a corresponding band cf teeth on the inner periphery of the cylindrical shell, and slots 1n the face 0f each fiat portion cf thc edgc of the disk, substantially as described with reference t0 the accompanying drawings.

11. A friction-clutch comprising a fixed member and a loose member both having smooth operating-surfaces, a smooth roller coperating with said surfaces, and means compelling the said roller t0 roll into and out of joint contact with ehe said surfaces; substantially as describcd.

In testimony whereof I have signed my na1ne t0 this specification in the presence 0f two subscribing witnesses.

A. C. F. DANN.

Witnesses:

A. KIRBY, ROBT. J. CUNNINGHAM. 

